Transcript

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Introduction to Compiler Construction• 1

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Objectives• Be able to build a compiler for a (simplified) (programming) language• Know how to use compiler construction tools, such as generators of scanners and parsers• Be familiar with assembly code and virtual machines, such as the JVM, and bytecode• Be able to define LL(1), LR(1), and LALR(1) grammars• Be familiar with compiler analysis and optimization techniques• … learn how to work on a larger software project! 2

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Compilers and Interpreters • “Compilation” – Translation of a program written in a source language into a semantically equivalent program written in a target language – Oversimplified view: Input Source Target CompilerProgram Program Error messages Output3

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The Analysis-Synthesis Model of Compilation• There are two parts to compilation: – Analysis determines the operations implied by the source program which are recorded in a tree structure – Synthesis takes the tree structure and translates the operations therein into the target program 5

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The Grouping of Phases• Compiler front and back ends: – Front end: analysis (machine independent) – Back end: synthesis (machine dependent)• Compiler passes: – A collection of phases is done only once (single pass) or multiple times (multi pass) • Single pass: usually requires everything to be defined before being used in source program • Multi pass: compiler may have to keep entire program representation in memory 8